The Rocky Mountains (often 'The Rockies') are a range of mountains in the western United States and Canada. They stretch from the northernmost part of British Columbia, in western Canada, to New Mexico, in the southwestern United States. The Rocky Mountains are more than 3,000 miles long (4,800 kilometers). The highest point in the Rocky Mountains is Mt. Elbert. Mt. Elbert is 14,433 ft tall (4,401m)